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Russula veternosa
Rust on Rubus
Rydbergia grandiflora
Rydbergia grandiflora
Sagittaria latifolia
Salix
Salix
Salix
Salix
Salix
Salix
Salix
Salix and Betula
Salix bebbiana
Salix, Betula, and Populus
Salix candida
Salix chlorophylla (Salix planifolia)
Salix glaucops
Salix group
Salix lucida
Salix pseudolapponum
Salix, winter condition
Salsola tragus (Salsola kali)
Salsola tragus (Salsola kali)
Sambucus canadensis (Sambucus nigra canadensis)
Sambucus pubens
Sambucus pubens
Sambucus racemosa
Sand beach
Sand dunes with Desmoschoenus spiralis
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinaria canadensis
Sanicula
Sanicula marilandica
Sanicula marilandica
San Juan Harbor
San Juan Harbor
San Juan Harbor
Sarcoscypha coccinea
Sarracenia purpurea
Saxifraga austromontana (Saxifraga bronchialis)
Saxifraga pensylvanica (Micranthes pensylvanica)
Saxifraga pensylvanica (Micranthes pensylvanica)
Scene in Kew Gardens
Scene in the Caucasus Mountains
Schoolhouse
Schroeteria
Scirpus